SELECT * FROM question_mgmt as q WHERE id=3607 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=256 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Periodic Classification of Element use mendel eacute ev rsquo s periodic table to pre

Question:

Use Mendeléev’s Periodic Table to predict the formulae for the oxides of the following elements:

    K,     C,      AI,      Si,      Ba.

Answer:

The formulae for oxide s of elements are:

K is in group 1. So, the oxide will be K2O.

C is in group 4. So, the oxide will be CO2.

Al is in group 3. So, the oxide will be Al2O3.

Si is in group 4. So, the oxide will be SiO2.

Ba is in group 2. So, the oxide will be BaO.


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